Physics - EMI/AC Question with Solution | TestHub

When a coil is connected across a $20\mathrm{V}$ dc supply, it draws a current of $5\mathrm{A}$. When it is connected across $20\mathrm{V},50\mathrm{Hz}$ ac supply, it draws a current of $4\mathrm{A}$. The self inductance of the coil is ______ $\mathrm{mH}$. $($ Take $\pi =3$ )